Dictionary

focal length en · NOUN

Meanings

1. A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance.

Forms

Deriveds

calibrated focal length

Translations (25)

ja 焦点距離 (distance) · fr distance focale (distance) · cmn 焦距 (distance) · cs ohnisková vzdálenost (distance) · hu gyújtótávolság (distance) · ru фо́кусное расстоя́ние (distance) · pt distância focal (distance) · id jarak pumpun (distance) · mi roa o te ngahunga (distance) · tl tingubing haba (distance) · sv brännvidd (distance) · hu fókusztávolság (distance) · nl brandpuntsafstand (distance) · nn brennvidde (distance) · da brændvidde (distance) · el εστιακή απόσταση (distance) · nb brennvidde (distance) · nn brennvidd (distance) · pl ogniskowa (distance) · ro distanță focală (distance) · mi roa ngahunga (distance) · fi polttoväli (distance) · de Brennweite (distance) · id jarak fokus (distance) · ga fad fócasach (distance)